Subthreshold 3 phase mixer

This thesis will discuss subthreshold FET mixers with a focus on conversion loss derivations. To begin understanding the mixers, a look into the FET model is first taken in Chapter II. Then in Chapter III, a single FET device mixer is studied and its conversion loss is found from its small-signal model. The chapter will then include a two FET device mixer and a four device FET mixer. Finally a new type of mixer will be discussed in Chapter IV.;The new type of mixer is a 3 phase mixer with the phase angles being 0°, 120°, and 240°. The theoretical conversion loss is found by treating the FETs as simple switches and a square wave as the RF signal. The resulting conversion loss is shown to be better than the previous mixers mentioned. The thesis will conclude with a discussion of future areas of work for the mixer.